Ready to set fan blade distance from Rad on my Prevost. How far away. This is a custom fit so I have no history/past guideline to go by. I bought coach without drive line and no fan or rad. Looks like 3 inches would be about where it would have been??? to much ? Bob

The shroud dictates the distance if you are using the Prevost angle drive and parts there is not much one can do about the distance,but I am thinking it is more than 3 inches by the time you add the clutch

My tunnel on the shroud is deep it looks to me like the fan is at least 5 or 6 inches from the radiator,it is a plastic fan 32 inches 12 blades

It is the prevost fan and to be honest don't know whether it is 10 or 12 was thinking 10 but it is out of sight now. I don't have shroud. But did come up with gear box from a different year that I had to modify to fit my mounts. Have air to air charger worked out and shroud will be easy. All in the suction thru the rad in the end. Thanks

No problem rolling a 3/8 rod into perfect circle with uniform clearance all the way around. From there the rest is easy. Was thinking about 3/8 inch clearance for flex. and possible blade growth. Could always be snugged up with plastic overlay. Bob

I agree with Boomer. Half of the fan blade outside the shroud. Don't forget to move your fan through the range of motion when checking for clearance in case you break the belts / belt. It travels in an arc. I used my stock fan and shroud. That allowed about 3/4" clearance between the fan and shroud when centered up. I'll try to measure the distance tomorrow, I'm guessing about 6" between the fan and radiator. If you need any of those little air bags let me know, got 2 new ones I didn't use.

4" from the blade tips to the fins and the trailing edge of the blades just barely protrudes from the shroud. There's also a double guard ring between the fan and the rad. Looks to be 3/4 x 1/4 flat bar rolled into rings.

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R.J.(Bob) EvansUsed to be 1981 Prevost 8-92, 10 spdCurrently busless (and not looking)My websiteOur weblogSimply growing older is not the same as living.

Thanks : to all:: now working it all out. I like the extra ring guard to protect rad from fan failure. They are high dollar and a bus stopper!. Simple things now save major $$$ later. Not reinventing light bulb here. Just doing the best Job possible with what i have. Would have been nice to have stock set up with coach. That did not happen-I did come up with one out of a 91 XL less fan shroud. Looks very good and workable. Ya'll guidance is always reassuring. Bob

BobThe front edge of the fan hub is 4.5" from the radiator, the fan blades are .75" from shroud and the shroud in 6" total depth from the radiator on my 91 Prevost XL 40. If you need more measurements, let me know.HTH

It's built. Not as bad as I thought it would be. Thanks to all. Just a few more pipe details to work out on air to air charger and rad pipes and major hook up work will be history. Thanks to all!! Would been allot easier to buy a coach finished---not as much fun!....BUSNUTS Bob